The “Chokkan” or “Formal upright” style is often visible in nature, especially when the tree is exposed to a lot of light and does not suffer competition with neighboring trees. The tapering of the straight trunk should be clearly visible, which means the trunk should be thickest at the bottom, progressing and becoming finer as it reaches the top. The first branching is visible at roughly 1/4 of the total trunk height, while the apex is formed by only one branch.